28 Aug
2019
28 Aug
'19
1:32 a.m.
I have had this problem in various PSUs, particularly in MicroVAXen. In my case replacing
them has been fairly straightforward. Not had this with my TRS-80 (Model 1) though. I
think it is a fairly common problem.
Regards
Rob
-----Original Message-----
From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Marvin Johnston
via cctalk
Sent: 28 August 2019 09:16
To: ClassicCmp <cctalk at classiccmp.org>
Subject: TRS-80 Fireworks
I'm just curious how many people have powered up their TRS-80 computers,
and ended up with a bang and a room filled with smoke?
So far, I've gotten the fireworks in two out of two TRS-80s (model 3 and
4) when they were powered up. In both cases, the problem was with the
main line filter capacitor mounted on one of the power supplies. The
computers continued to work which was my first clue the problem was not
serious :).
Is this a normal problem with these older computers? I'm used to seeing the
electrolytics give problems, but this is the first time I've seen one of the X
type line filter caps blow.